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中文摘要：
阐述一种利用多传感器融合技术来提高定位精度和可靠度的方法。将GPS定位技术引入到现有的基于里程计的列车定位方法中，降低里程计单独定位时的误差。分析了数据信息的同步问题并利用GPS接收机的秒脉冲信号实现数据信息的同步。当GPS信号短暂失锁时，采用里程计单独定位，GPS信号一旦重获就对里程计定位误差进行修正，从而提高列车定位系统的定位性能。现场实验结果证明该列车定位系统能够以一种简单的方法提高列车定位系统的精度、可靠度和连续性。
英文摘要：
An efficient method to improve the position accuracy and reliability with the multi-sensor fusion position technology is elaborated. The global positioning system（GPS） is introduced into the train position method based on existing odometer（ODO）, which can reduce the position error. The problem of data synchronization is analyzed. The data synchronization is realized with the PPS signal of GPS receiver. When GPS signals suffer from blockage for a short time, an odometer is used separately to position. Once GPS signals is regained, the error caused by the odometer position is corrected to improve the position performance of the train position system. The experimental results demonstrate that the train position system can improve the train precision accuracy, reliability and continuity with a simple method.
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